C0252

DTC C0252

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach. Initial Inspection and Diagnostic Overview
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0252 00

VSES Sensor Uncorrelated

Circuit/System Description

The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) and monitors the yaw rate/lateral accelerometer sensor, and steering wheel angle sensor inputs to ensure they correlate within their desired ranges.

Conditions for Running the DTC

* The steer angle has been centered.
* The VSES is active.
* The centered lateral acceleration value is less than 0.5 g.
* The yaw rate error is less than 6 degrees/second.

Conditions for Setting the DTC

One of the following conditions exists:

* The DTC sets when VSES is engaged for 10 seconds with the yaw rate error always in either understeer or oversteer.
* The yaw rate error is greater then 10 degrees/second for 5 seconds, and the yaw has not changed and the lateral acceleration is less than 0.5 g.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
* The ABS and VSES indicators illuminate.
* The driver information center (DIC) displays the Service Traction Control and Stabilitrak message.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

The following conditions can cause this concern:

* Improper steering alignment
* An internal lateral accelerometer failure

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Antilock Brake System Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Scan Tool Data List for EBCM

Circuit/System Verification

Verify that the following DTCs are not set: C0186, C0196, C0253, C0710

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions